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Foster Products

ZSi Products


SVPC Series Safety Vent Couplers -- With Protective Cover
(Industrial Interchange)
Sizes and Pricing

Female Pipe Thread
Sizes and Pricing

Male Pipe Thread
Sizes and Pricing

Push-On Hose Stem
Sizes and Pricing

Hose Barb
(Requires Hose Clamp)
Sizes and Pricing

Hose Barb
(Requires Hose Clamp)
Sizes and Pricing

Hose Barb, with Strain Relief
(Requires Hose Clamp)

Note: All SV, SVPC Sockets feature a Silicone-free assembly.


Foster SV and SVPC Series Safety Vent couplings are designed for maximum user and equipment safety. Foster SV and SVPC Series couplings allow for safe and easy connection/disconnection under zero line pressure to minimize the possibility of inadvertent
disconnection and potential hose whip.

The fully encapsulated non-marring models significantly reduce the risk of surface nicks and scratches. Ideal for use in paint booth applications or for air lines used around finished surfaces, such as fiberglass, painted metal or glass surfaces.


  • Made in the USA

  • Rubber or polyurethane hose connections available

  • Extra thick heat-treated steel walls extend service life

  • Zero pressure connect/disconnect design vents down stream pressure for safe, easy connect/disconnect. It also minimizes possible inadvertent disconnection and potentially dangerous hose whip

  • "O-ring" plug seal for leak-free performance

  • No replacement parts used (valve, spring, or washer) that could block flow of air.

  • Silicone-free assembly.

  • Meets ISO 4414, 9.6 Quick-Action Couplings requirements:

    -- Quick-Action (quick release) couplings shall be selected so that when they are coupled or uncoupled

    -- a) the coupling shall not be forced apart in a hazardous manner

    -- b) compressed air particles shall not be expelled in a hazardous manner

    -- c) a controlled pressure-release system shall be provided where a hazard may exist.

Material: Zinc-plated steel, Acetal Copolymer outside cover, Steel internals

Seal: Buna-N

Working Pressure: 300 PSIG; vacuum to 26"Hg

Body Sizes: 1/4" to 3/4" Industrial Interchange Design

Connection Sizes: 1/4" to 1" NPT; 1/4" to 3/4" Hose Barb

Interchangeability: Complies with ANSI/NFPA T3.20.14-1990, IS0 6150-B, & ISO 4414

Rated Pressure: 300 psi

Temperature Range (std seals): 0° to +150° F

Locking Device: Stainless Steel Balls

Force required to Connect: Less than 10 lbs

Operation: SV and SVPC Series Safety Vent couplers are nearly effortless to connect and great for hose use. They are also especially useful for single-hand operation when they are mounted to hard lines such as an overhead air drop.

Once inserted into the SV or SVPC socket, the plug is lightly gripped and will stay in place allowing the operator to use the same hand to slide the sleeve straight forward to the "on" position.

SV or SVPC Series sockets can also be used as a 3-way valve to turn off the flow of air and exhaust the downstream pressure without disengaging the plug. By turning and sliding the sleeve to the "exhaust" position, downstream air pressure is relieved but the plug remains locked in place. Turning and sliding the sleeve in the opposite direction allows air to flow again.

Foster SV or SVPC Series couplers are the ultimate solution to accidental disconnect hose whip dangers.

"SV","SVPC" Series (1/4", 3/8", 1/2", 3/4")
Pressure Drop/Flow Performance Curves @ 100 PSIG Inlet

Zero Pressure Connect and Disconnect

Step [1] Insert Plug - Output is Zero Pressure

Step [2] Plug is Locked in Place, Now Restore Output Pressure

Step [3] System Under Pressure (both source and Output)

Step [4] Remove Pressure From Output
-- Acts as a Shut-Off Valve --

Step [5] Remove Plug - Output Pressure is Automatically Zero

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